Incandescent-lamp socket.



F. W. SLADY.

INGANDESCENT LAMP SOCKET.

APPLICATION FILED MAY 24,

Patented NOV. 23, 1909.

32513 El/thine@ -citizenof the United States UNITED sTaTes PATENT carton.

FRANK W. sLADr, ,or BRIDGE'PORT, ooNivEoTroUT, 'Assrenon To THE :BRYANT ELEG- 1 Taro coiirrAnY, o F BRIDs-EPQRT, CONNECTICUT, A conronarron or CONNECTICUT.

Speeicaticn of Letters Patent.

AIncin'intso'nivT-L eri/rr socKET.

ratentednov, 23.1909.

Application filed May-24, 1909. Serial No. 498,034.

To attjwhom #may concern.'

Be it known that I, FRANK IV. SLADY, a of America, and residing at Bridgeport, in the county of Ifaireld and State of Connecticut, have invented a cert-ain new and useiul Improvement in Incandescent- Lamp Sockets, of which the following is a specification. My invention relates to incandescent lamp 'sockets and particularly to pull soclrets,-the object of my invention being to improve the same in the particulars hereinafter set forth. In the accompanying drawings, Figure 1 a vertical elevation partially in section of a lamp socket .in which my invention is embodied in one forni; F 2 is a perspectiveview of detached details; F ig. 3 is a. vbrokenV vertical sectional view of a socket showing a modiiied construction; Fig. i is patent there is no 5'5- a similar View showing another modification; F 5 is an elevation of the chain rail. My invention is shown applied to a pull socket of the type described in the Platt 716,578 having upper andlower intt-ing butt4 i. and B J.veen which the swiemi ianism a :tinged on a spindle. rions methods of insuia the switch spindle from the switch membe so as to prevent the lamp current from reaching the switch operating mechanism have been devised' and it is one of the objects of the present invention to provide improved mea-ns for accomplishing this purpose. To this end I substitute a switch spindle 10 of insulating material, preferably liber, for the usual metallic spindle, or

at least for part of the usual length of the latter. Thus in Fig. 1 for example a metallic spindle 11, carried by the bushing 12, extends a sufficient distance into the centra-l perforation of the rotary insulating block 13 on which the switch piece 14 is mounted -to form a bearing therefor, while the liber thus completely insulated from the switch member 14. As shown inf-"'Iig.y 3 the liber spindle 10 may be made in. one with the insulating block 13, ifv desired,'in which case perforation of the block 13, but -merely a slight recessv 24 in the lower-face in which the spindle 11 is slight recesses 2O in the ceive the lu s 21 struck down from the lower ratchet member. In Fig. 4 the iber spindle is carried all the way thro'iigh the' block 13 into the bushing 12 which, in this construction, has areeess 25 in which the lower end of the spindle is stepped. The preferred construction however,A is that shown in Fig. 1' since in 'this arrangement the ends of the fiber spindle have more or/ less play in the cap and block 13 and au easier movement of lthe switch operating mechanism is thereby secured since there is stepped, 'and upper tace to re- `no tendency to bind as is the case with a rigid spindle.

In any or" the constructions the action of the brushes is on the center l-ine of the switch piece bearing' which tends to maintain its brushes in correct alinement, whereas in the construction shown in the copcnding application Thomas Serial No. 496,216, with the bearing riveted to the lower face of the switch piece, the bearing for the latter is considerably below the center line. Furthermore the present construction is more rea-ily z nd more economically manufactured.

Another feature oi my invention relates to the chain rail 19 (Fig. 5) and consists in angling the slot 17 in which vthe link-connecting theterminal balls 1S lies when the chain 22 is in place. wWith this device it is impossible for the .terminal ball to work loose from its catch 'on the chainrail, so long as the socket is incased within its shell since it is neQeSSary in order to extricate the terminal ball, to lift the body of the chain out of the chain rail and not only swing it out at the angle of the slot 17 but also to bring it up practically perpendicular to the hole 18 into which the slot opens.

The invention is not limited to the precise construction shown but may be adapted to various conditions and needs to which it` is suited.

I claim as my invention:

1. In a lamp socket, upper and lower insulating buttons and a switch mechanism interposed between the same, comprising a rotary insulating block, a switch member carried on onev side thereof, a switch operating mechanism on the other side of said block and a spindle of insulating material on which the oscillating member of the ratchet -is mounted.

2. In a lamp socket, a chain rail having a ball catch with angled slot adapted to receive a link,v as and for the purpose described.

3. In a lamp socket, upper and lower insulating buttons, and a-swtch mechanism interposed between the same', said mechanism having a rotary insulating member, a contact mem'ber carried on one side thereof, and aswitch operati-ng mechanism on the other side 1thereof together with a spindle of insulatng material on which said rotary member is journaled.

,4. In a lamp socket, upper and lower insulating buttons, a spindle of insulating ma terial extending between said4 buttons, to- 15 gether with a rotary switch member and operatng .mechanism therefor mounted on said spindle. l

In testimony whereof I have signed my name to this specification, in the presence of 20 two subscribing witnesses.

FRANK w. SLADY.A

Witnesses:

F. E. SEELEY, GEORGE B. THOMAS. 

